/**
 * @version: 1.3.2
 * @author: Dan Grossman http://www.dangrossman.info/
 * @date: 2014-01-22
 * @copyright: Copyright (c) 2012-2014 Dan Grossman. All rights reserved.
 * @license: Licensed under Apache License v2.0. See http://www.apache.org/licenses/LICENSE-2.0
 * @website: http://www.improvely.com/
 */
!function($) {

	var DateRangePicker = function(element, options, cb) {

		// by default, the daterangepicker element is placed at the bottom of HTML body
		this.parentEl = 'body';

		//element that triggered the date range picker
		this.element = $(element);

		//create the picker HTML object
		var DRPTemplate = '<div class="daterangepicker dropdown-menu">'
				+ '<div class="calendar left"></div>'
				+ '<div class="calendar right"></div>'
				+ '<div class="ranges">'
				+ '<div class="range_inputs">'
				+ '<div class="daterangepicker_start_input">'
				+ '<label for="daterangepicker_start"></label>'
				+ '<input class="input-mini" type="text" name="daterangepicker_start" value="" disabled="disabled" />'
				+ '</div>'
				+ '<div class="daterangepicker_end_input">'
				+ '<label for="daterangepicker_end"></label>'
				+ '<input class="input-mini" type="text" name="daterangepicker_end" value="" disabled="disabled" />'
				+ '</div>'
				+ '<button class="applyBtn" disabled="disabled"></button>&nbsp;'
				+ '<button class="cancelBtn"></button>' + '</div>' + '</div>'
				+ '</div>';

		this.parentEl = (typeof options == 'object' && options.parentEl && $(options.parentEl))
				|| $(this.parentEl);
		this.container = $(DRPTemplate).appendTo(this.parentEl);

		//custom options
		if (typeof options != 'object')
			options = {};
		this.setOptions(options, cb);

		//apply CSS classes and labels to buttons
		var c = this.container;
		$.each(this.buttonClasses, function(idx, val) {
			c.find('button').addClass(val);
		});
		this.container.find('.daterangepicker_start_input label').html(
				this.locale.fromLabel);
		this.container.find('.daterangepicker_end_input label').html(
				this.locale.toLabel);
		if (this.applyClass.length)
			this.container.find('.applyBtn').addClass(this.applyClass);
		if (this.cancelClass.length)
			this.container.find('.cancelBtn').addClass(this.cancelClass);
		this.container.find('.applyBtn').html(this.locale.applyLabel);
		this.container.find('.cancelBtn').html(this.locale.cancelLabel);

		//event listeners
		this.container.on('mousedown', $.proxy(this.mousedown, this));

		this.container.find('.calendar').on('click', '.prev',
				$.proxy(this.clickPrev, this)).on('click', '.next',
				$.proxy(this.clickNext, this)).on('click', 'button.applyBtn_s',
				$.proxy(this.clickApply_s, this)).on('click', 'td.available',
				$.proxy(this.clickDate, this)).on('mouseenter', 'td.available',
				$.proxy(this.enterDate, this)).on('mouseleave', 'td.available',
				$.proxy(this.updateFormInputs, this)).on('change',
				'select.yearselect', $.proxy(this.updateMonthYear, this)).on(
				'change', 'select.monthselect',
				$.proxy(this.updateMonthYear, this)).on('change',
				'select.hourselect,select.minuteselect,select.ampmselect',
				$.proxy(this.updateTime, this));

		this.container.find('.ranges').on('click', 'button.applyBtn',
				$.proxy(this.clickApply, this))

		.on('click', 'button.cancelBtn', $.proxy(this.clickCancel, this)).on(
				'click',
				'.daterangepicker_start_input,.daterangepicker_end_input',
				$.proxy(this.showCalendars, this)).on('click', 'li',
				$.proxy(this.clickRange, this)).on('mouseenter', 'li',
				$.proxy(this.enterRange, this)).on('mouseleave', 'li',
				$.proxy(this.updateFormInputs, this));

		if (this.element.is('input')) {
			this.element.on({
				'click.daterangepicker' : $.proxy(this.show, this),
				'focus.daterangepicker' : $.proxy(this.show, this),
				'keyup.daterangepicker' : $.proxy(this.updateFromControl, this)
			});
		} else {
			this.element.on('click.daterangepicker', $.proxy(this.show, this));
		}

	};

	DateRangePicker.prototype = {

		constructor : DateRangePicker,

		setOptions : function(options, callback) {

			this.startDate = moment().startOf('day');
			this.endDate = moment().startOf('day');
			this.minDate = false;
			this.maxDate = false;
			this.dateLimit = false;

			this.showDropdowns = false;
			this.showWeekNumbers = false;
			this.timePicker = false;
			this.timePickerIncrement = 30;
			this.timePicker12Hour = true;
			this.singleDatePicker = false;
			this.ranges = {};

			this.opens = 'right';
			if (this.element.hasClass('pull-right'))
				this.opens = 'left';

			this.buttonClasses = [ 'btn', 'btn-small' ];
			this.applyClass = 'btn-success';
			this.cancelClass = 'btn-default';

			this.format = 'MM/DD/YYYY';
			this.separator = ' - ';

			this.locale = {
				applyLabel : '确定',
				cancelLabel : '取消',
				fromLabel : '从',
				toLabel : '至',
				weekLabel : '周',
				customRangeLabel : '自定义',
				daysOfWeek : moment()._lang._weekdaysMin.slice(),
				monthNames : moment()._lang._monthsShort.slice(),
				firstDay : 0
			};

			this.cb = function() {
			};

			if (typeof options.format == 'string')
				this.format = options.format;

			if (typeof options.separator == 'string')
				this.separator = options.separator;

			if (typeof options.startDate == 'string')
				this.startDate = moment(options.startDate, this.format);

			if (typeof options.endDate == 'string')
				this.endDate = moment(options.endDate, this.format);

			if (typeof options.minDate == 'string')
				this.minDate = moment(options.minDate, this.format);

			if (typeof options.maxDate == 'string')
				this.maxDate = moment(options.maxDate, this.format);

			if (typeof options.startDate == 'object')
				this.startDate = moment(options.startDate);

			if (typeof options.endDate == 'object')
				this.endDate = moment(options.endDate);

			if (typeof options.minDate == 'object')
				this.minDate = moment(options.minDate);

			if (typeof options.maxDate == 'object')
				this.maxDate = moment(options.maxDate);

			if (typeof options.applyClass == 'string')
				this.applyClass = options.applyClass;

			if (typeof options.cancelClass == 'string')
				this.cancelClass = options.cancelClass;

			if (typeof options.dateLimit == 'object')
				this.dateLimit = options.dateLimit;

			// update day names order to firstDay
			if (typeof options.locale == 'object') {

				if (typeof options.locale.daysOfWeek == 'object') {
					// Create a copy of daysOfWeek to avoid modification of original
					// options object for reusability in multiple daterangepicker instances
					this.locale.daysOfWeek = options.locale.daysOfWeek.slice();
				}

				if (typeof options.locale.monthNames == 'object') {
					this.locale.monthNames = options.locale.monthNames.slice();
				}

				if (typeof options.locale.firstDay == 'number') {
					this.locale.firstDay = options.locale.firstDay;
					var iterator = options.locale.firstDay;
					while (iterator > 0) {
						this.locale.daysOfWeek.push(this.locale.daysOfWeek
								.shift());
						iterator--;
					}
				}

				if (typeof options.locale.applyLabel == 'string') {
					this.locale.applyLabel = options.locale.applyLabel;
				}

				if (typeof options.locale.cancelLabel == 'string') {
					this.locale.cancelLabel = options.locale.cancelLabel;
				}

				if (typeof options.locale.fromLabel == 'string') {
					this.locale.fromLabel = options.locale.fromLabel;
				}

				if (typeof options.locale.toLabel == 'string') {
					this.locale.toLabel = options.locale.toLabel;
				}

				if (typeof options.locale.weekLabel == 'string') {
					this.locale.weekLabel = options.locale.weekLabel;
				}

				if (typeof options.locale.customRangeLabel == 'string') {
					this.locale.customRangeLabel = options.locale.customRangeLabel;
				}
			}

			if (typeof options.opens == 'string')
				this.opens = options.opens;

			if (typeof options.showWeekNumbers == 'boolean') {
				this.showWeekNumbers = options.showWeekNumbers;
			}

			if (typeof options.buttonClasses == 'string') {
				this.buttonClasses = [ options.buttonClasses ];
			}

			if (typeof options.buttonClasses == 'object') {
				this.buttonClasses = options.buttonClasses;
			}

			if (typeof options.showDropdowns == 'boolean') {
				this.showDropdowns = options.showDropdowns;
			}

			if (typeof options.singleDatePicker == 'boolean') {
				this.singleDatePicker = options.singleDatePicker;
			}

			if (typeof options.timePicker == 'boolean') {
				this.timePicker = options.timePicker;
			}

			if (typeof options.timePickerIncrement == 'number') {
				this.timePickerIncrement = options.timePickerIncrement;
			}

			if (typeof options.timePicker12Hour == 'boolean') {
				this.timePicker12Hour = options.timePicker12Hour;
			}

			//if no start/end dates set, check if an input element contains initial values
			if (typeof options.startDate == 'undefined'
					&& typeof options.endDate == 'undefined') {
				if ($(this.element).is('input[type=text]')) {
					var val = $(this.element).val();
					var split = val.split(this.separator);
					var start, end;
					if (split.length == 2) {
						start = moment(split[0], this.format);
						end = moment(split[1], this.format);
					} else if (this.singleDatePicker) {
						start = moment(val, this.format);
						end = moment(val, this.format);
					}
					if (start != null && end != null) {
						this.startDate = start;
						this.endDate = end;
					}
				}
			}

			if (typeof options.ranges == 'object') {
				for ( var range in options.ranges) {

					var start = moment(options.ranges[range][0]);
					var end = moment(options.ranges[range][1]);

					// If we have a min/max date set, bound this range
					// to it, but only if it would otherwise fall
					// outside of the min/max.
					if (this.minDate && start.isBefore(this.minDate))
						start = moment(this.minDate);

					if (this.maxDate && end.isAfter(this.maxDate))
						end = moment(this.maxDate);

					// If the end of the range is before the minimum (if min is set) OR
					// the start of the range is after the max (also if set) don't display this
					// range option.
					if ((this.minDate && end.isBefore(this.minDate))
							|| (this.maxDate && start.isAfter(this.maxDate))) {
						continue;
					}

					this.ranges[range] = [ start, end ];
				}

				var list = '<ul>';
				for ( var range in this.ranges) {
					list += '<li>' + range + '</li>';
				}
				list += '<li>' + this.locale.customRangeLabel + '</li>';
				list += '</ul>';
				this.container.find('.ranges ul').remove();
				this.container.find('.ranges').prepend(list);
			}

			if (typeof callback == 'function') {
				this.cb = callback;
			}

			if (!this.timePicker) {
				this.startDate = this.startDate.startOf('day');
				this.endDate = this.endDate.startOf('day');
			}

			if (this.singleDatePicker) {
				this.opens = 'right';
				this.container.find('.calendar.right').show();
				this.container.find('.calendar.left').hide();
				this.container.find('.ranges').hide();
				if (!this.container.find('.calendar.right').hasClass('single'))
					this.container.find('.calendar.right').addClass('single');
			} else {
				this.container.find('.calendar.right').removeClass('single');
				this.container.find('.ranges').show();
			}

			this.oldStartDate = this.startDate.clone();
			this.oldEndDate = this.endDate.clone();

			this.leftCalendar = {
				month : moment([ this.startDate.year(), this.startDate.month(),
						1, this.startDate.hour(), this.startDate.minute() ]),
				calendar : []
			};

			this.rightCalendar = {
				month : moment([ this.endDate.year(), this.endDate.month(), 1,
						this.endDate.hour(), this.endDate.minute() ]),
				calendar : []
			};

			if (this.opens == 'right') {
				//swap calendar positions
				var left = this.container.find('.calendar.left');
				var right = this.container.find('.calendar.right');
				left.removeClass('left').addClass('right');
				right.removeClass('right').addClass('left');
			}

			if (typeof options.ranges == 'undefined' && !this.singleDatePicker) {
				this.container.find('.calendar').show();
			}

			this.container.addClass('opens' + this.opens);

			this.updateView();
			this.updateCalendars()

		},

		setStartDate : function(startDate) {
			if (typeof startDate == 'string')
				this.startDate = moment(startDate, this.format);

			if (typeof startDate == 'object')
				this.startDate = moment(startDate);

			if (!this.timePicker)
				this.startDate = this.startDate.startOf('day');

			this.oldStartDate = this.startDate.clone();

			this.updateView();
			this.updateCalendars();
		},

		setEndDate : function(endDate) {
			if (typeof endDate == 'string')
				this.endDate = moment(endDate, this.format);

			if (typeof endDate == 'object')
				this.endDate = moment(endDate);

			if (!this.timePicker)
				this.endDate = this.endDate.startOf('day');

			this.oldEndDate = this.endDate.clone();

			this.updateView();
			this.updateCalendars();
		},

		mousedown : function(e) {
			e.stopPropagation();
		},

		updateView : function() {
			this.leftCalendar.month.month(this.startDate.month()).year(
					this.startDate.year());
			this.rightCalendar.month.month(this.endDate.month()).year(
					this.endDate.year());
			this.updateFormInputs();
		},

		updateFormInputs : function() {
			this.container.find('input[name=daterangepicker_start]').val(
					this.startDate.format(this.format));
			this.container.find('input[name=daterangepicker_end]').val(
					this.endDate.format(this.format));

			if (this.startDate.isSame(this.endDate)
					|| this.startDate.isBefore(this.endDate)) {
				this.container.find('button.applyBtn').removeAttr('disabled');
			} else {
				this.container.find('button.applyBtn').attr('disabled',
						'disabled');
			}
		},

		updateFromControl : function() {
			if (!this.element.is('input'))
				return;
			if (!this.element.val().length)
				return;

			var dateString = this.element.val().split(this.separator);
			var start = moment(dateString[0], this.format);
			var end = moment(dateString[1], this.format);

			if (this.singleDatePicker) {
				start = moment(this.element.val(), this.format);
				end = start;
			}

			if (start == null || end == null)
				return;
			if (end.isBefore(start))
				return;

			this.oldStartDate = this.startDate.clone();
			this.oldEndDate = this.endDate.clone();

			this.startDate = start;
			this.endDate = end;

			if (!this.startDate.isSame(this.oldStartDate)
					|| !this.endDate.isSame(this.oldEndDate))
				this.notify();

			this.updateCalendars();
		},

		notify : function() {
			this.updateView();
			this.cb(this.startDate, this.endDate);
		},

		move : function() {
			var parentOffset = {
				top : 0,
				left : 0
			};
			if (!this.parentEl.is('body')) {
				parentOffset = {
					top : this.parentEl.offset().top
							- this.parentEl.scrollTop(),
					left : this.parentEl.offset().left
							- this.parentEl.scrollLeft()
				};
			}

			if (this.opens == 'left') {
				this.container.css({
					top : this.element.offset().top
							+ this.element.outerHeight() - parentOffset.top,
					right : $(window).width() - this.element.offset().left
							- this.element.outerWidth() - parentOffset.left,
					left : 'auto'
				});
				if (this.container.offset().left < 0) {
					this.container.css({
						right : 'auto',
						left : 9
					});
				}
			} else {
				this.container.css({
					top : this.element.offset().top
							+ this.element.outerHeight() - parentOffset.top,
					left : this.element.offset().left - parentOffset.left,
					right : 'auto'
				});
				if (this.container.offset().left + this.container.outerWidth() > $(
						window).width()) {
					this.container.css({
						left : 'auto',
						right : 0
					});
				}
			}
		},

		show : function(e) {
			this.container.show();
			this.move();

			if (e) {
				e.stopPropagation();
				e.preventDefault();
			}

			$(document).on('mousedown', $.proxy(this.hide, this));
			this.element.trigger('show', this);
		},

		hide : function(e) {
			this.container.hide();

			if (!this.startDate.isSame(this.oldStartDate)
					|| !this.endDate.isSame(this.oldEndDate))
				this.notify();

			this.oldStartDate = this.startDate.clone();
			this.oldEndDate = this.endDate.clone();

			$(document).off('mousedown', this.hide);
			this.element.trigger('hide', this);
		},

		enterRange : function(e) {
			var label = e.target.innerHTML;
			if (label == this.locale.customRangeLabel) {
				this.updateView();
			} else {
				var dates = this.ranges[label];
				this.container.find('input[name=daterangepicker_start]').val(
						dates[0].format(this.format));
				this.container.find('input[name=daterangepicker_end]').val(
						dates[1].format(this.format));
			}
		},

		showCalendars : function() {
			this.container.find('.calendar').show();
			this.move();
		},

		updateInputText : function() {
			if (this.element.is('input') && !this.singleDatePicker) {
				this.element.val(this.startDate.format(this.format)
						+ this.separator + this.endDate.format(this.format));
			} else if (this.element.is('input')) {
				this.element.val(this.startDate.format(this.format));
			}

		},

		clickRange : function(e) {
			var label = e.target.innerHTML;
			if (label == this.locale.customRangeLabel) {
				this.showCalendars();
			} else {
				var dates = this.ranges[label];

				this.startDate = dates[0];
				this.endDate = dates[1];

				if (!this.timePicker) {
					this.startDate.startOf('day');
					this.endDate.startOf('day');
				}

				this.leftCalendar.month.month(this.startDate.month()).year(
						this.startDate.year()).hour(this.startDate.hour())
						.minute(this.startDate.minute());
				this.rightCalendar.month.month(this.endDate.month()).year(
						this.endDate.year()).hour(this.endDate.hour()).minute(
						this.endDate.minute());
				this.updateCalendars();

				this.updateInputText();

				this.container.find('.calendar').hide();
				this.hide();
				this.element.trigger('apply', this);
			}
		},

		clickPrev : function(e) {
			var cal = $(e.target).parents('.calendar');
			if (cal.hasClass('left')) {
				this.leftCalendar.month.subtract('month', 1);
			} else {
				this.rightCalendar.month.subtract('month', 1);
			}
			this.updateCalendars();
		},

		clickNext : function(e) {
			var cal = $(e.target).parents('.calendar');
			if (cal.hasClass('left')) {
				this.leftCalendar.month.add('month', 1);
			} else {
				this.rightCalendar.month.add('month', 1);
			}
			this.updateCalendars();
		},

		enterDate : function(e) {

			var title = $(e.target).attr('data-title');
			var row = title.substr(1, 1);
			var col = title.substr(3, 1);
			var cal = $(e.target).parents('.calendar');

			if (cal.hasClass('left')) {
				this.container.find('input[name=daterangepicker_start]').val(
						this.leftCalendar.calendar[row][col]
								.format(this.format));
			} else {
				this.container.find('input[name=daterangepicker_end]').val(
						this.rightCalendar.calendar[row][col]
								.format(this.format));
			}

		},

		clickDate : function(e) {
			var title = $(e.target).attr('data-title');
			var row = title.substr(1, 1);
			var col = title.substr(3, 1);
			var cal = $(e.target).parents('.calendar');

			if (cal.hasClass('left')) {
				var startDate = this.leftCalendar.calendar[row][col];
				var endDate = this.endDate;
				if (typeof this.dateLimit == 'object') {
					var maxDate = moment(startDate).add(this.dateLimit)
							.startOf('day');
					if (endDate.isAfter(maxDate)) {
						endDate = maxDate;
					}
				}
			} else {
				var startDate = this.startDate;
				var endDate = this.rightCalendar.calendar[row][col];
				if (typeof this.dateLimit == 'object') {
					var minDate = moment(endDate).subtract(this.dateLimit)
							.startOf('day');
					if (startDate.isBefore(minDate)) {
						startDate = minDate;
					}
				}
			}

			if (this.singleDatePicker && cal.hasClass('left')) {
				endDate = startDate;
			} else if (this.singleDatePicker && cal.hasClass('right')) {
				startDate = endDate;
			}

			cal.find('td').removeClass('active');

			if (startDate.isSame(endDate) || startDate.isBefore(endDate)) {
				$(e.target).addClass('active');
				this.startDate = startDate;
				this.endDate = endDate;
			} else if (startDate.isAfter(endDate)) {
				$(e.target).addClass('active');
				this.startDate = startDate;
				this.endDate = moment(startDate).add('day', 1).startOf('day');
			}

			this.leftCalendar.month.month(this.startDate.month()).year(
					this.startDate.year());
			this.rightCalendar.month.month(this.endDate.month()).year(
					this.endDate.year());
			this.updateCalendars();

			if (this.singleDatePicker)
				this.clickApply();
		},

		clickApply : function(e) {
			this.updateInputText();
			if (!this.singleDatePicker || (this.singleDatePicker && !this.timePicker))
				this.hide();
			this.element.trigger('apply', this);
		},
		clickApply_s : function(e) {
			this.updateInputText();
			this.hide();
			this.element.trigger('apply', this);
		},
		clickCancel : function(e) {
			this.startDate = this.oldStartDate;
			this.endDate = this.oldEndDate;
			this.updateView();
			this.updateCalendars();
			this.hide();
			this.element.trigger('cancel', this);
		},

		updateMonthYear : function(e) {

			var isLeft = $(e.target).closest('.calendar').hasClass('left');
			var cal = this.container.find('.calendar.left');
			if (!isLeft)
				cal = this.container.find('.calendar.right');

			// Month must be Number for new moment versions
			var month = parseInt(cal.find('.monthselect').val(), 10);
			var year = cal.find('.yearselect').val();

			if (isLeft) {
				this.leftCalendar.month.month(month).year(year);
			} else {
				this.rightCalendar.month.month(month).year(year);
			}

			this.updateCalendars();

		},

		updateTime : function(e) {

			var isLeft = $(e.target).closest('.calendar').hasClass('left');
			var cal = this.container.find('.calendar.left');
			if (!isLeft)
				cal = this.container.find('.calendar.right');

			var hour = parseInt(cal.find('.hourselect').val());
			var minute = parseInt(cal.find('.minuteselect').val());

			if (this.timePicker12Hour) {
				var ampm = cal.find('.ampmselect').val();
				if (ampm == 'PM' && hour < 12)
					hour += 12;
				if (ampm == 'AM' && hour == 12)
					hour = 0;
			}

			if (isLeft) {
				var start = this.startDate.clone();
				start.hour(hour);
				start.minute(minute);
				this.startDate = start;
				this.leftCalendar.month.hour(hour).minute(minute);
			} else {
				var end = this.endDate.clone();
				end.hour(hour);
				end.minute(minute);
				this.endDate = end;
				this.rightCalendar.month.hour(hour).minute(minute);
			}

			this.updateCalendars();

		},

		updateCalendars : function() {
			this.leftCalendar.calendar = this.buildCalendar(
					this.leftCalendar.month.month(), this.leftCalendar.month
							.year(), this.leftCalendar.month.hour(),
					this.leftCalendar.month.minute(), 'left');
			this.rightCalendar.calendar = this.buildCalendar(
					this.rightCalendar.month.month(), this.rightCalendar.month
							.year(), this.rightCalendar.month.hour(),
					this.rightCalendar.month.minute(), 'right');
			this.container.find('.calendar.left').html(
					this.renderCalendar(this.leftCalendar.calendar,
							this.startDate, this.minDate, this.maxDate));
			this.container.find('.calendar.right').html(
					this.renderCalendar(this.rightCalendar.calendar,
							this.endDate, this.startDate, this.maxDate));
			if (this.singleDatePicker) {
				this.container.find('.applyBtn_s').addClass(this.applyClass);
				this.container.find('.applyBtn_s').html(this.locale.applyLabel);
				this.container.find('button.applyBtn_s').removeAttr('disabled');
			} else {
				this.container.find('.applyBtn_s').hide();
			}

			this.container.find('.ranges li').removeClass('active');
			var customRange = true;
			var i = 0;
			for ( var range in this.ranges) {
				if (this.timePicker) {
					if (this.startDate.isSame(this.ranges[range][0])
							&& this.endDate.isSame(this.ranges[range][1])) {
						customRange = false;
						this.container.find('.ranges li:eq(' + i + ')')
								.addClass('active');
					}
				} else {
					//ignore times when comparing dates if time picker is not enabled
					if (this.startDate.format('YYYY-MM-DD') == this.ranges[range][0]
							.format('YYYY-MM-DD')
							&& this.endDate.format('YYYY-MM-DD') == this.ranges[range][1]
									.format('YYYY-MM-DD')) {
						customRange = false;
						this.container.find('.ranges li:eq(' + i + ')')
								.addClass('active');
					}
				}
				i++;
			}
			if (customRange)
				this.container.find('.ranges li:last').addClass('active');
		},

		buildCalendar : function(month, year, hour, minute, side) {

			var firstDay = moment([ year, month, 1 ]);
			var lastMonth = moment(firstDay).subtract('month', 1).month();
			var lastYear = moment(firstDay).subtract('month', 1).year();

			var daysInLastMonth = moment([ lastYear, lastMonth ]).daysInMonth();

			var dayOfWeek = firstDay.day();

			//initialize a 6 rows x 7 columns array for the calendar
			var calendar = [];
			for ( var i = 0; i < 6; i++) {
				calendar[i] = [];
			}

			//populate the calendar with date objects
			var startDay = daysInLastMonth - dayOfWeek + this.locale.firstDay
					+ 1;
			if (startDay > daysInLastMonth)
				startDay -= 7;

			if (dayOfWeek == this.locale.firstDay)
				startDay = daysInLastMonth - 6;

			var curDate = moment([ lastYear, lastMonth, startDay, 12, minute ]);
			for ( var i = 0, col = 0, row = 0; i < 42; i++, col++, curDate = moment(
					curDate).add('hour', 24)) {
				if (i > 0 && col % 7 == 0) {
					col = 0;
					row++;
				}
				calendar[row][col] = curDate.clone().hour(hour);
				curDate.hour(12);
			}

			return calendar;

		},

		renderDropdowns : function(selected, minDate, maxDate) {
			var currentMonth = selected.month();
			var monthHtml = '<select class="monthselect">';
			var inMinYear = false;
			var inMaxYear = false;

			for ( var m = 0; m < 12; m++) {
				if ((!inMinYear || m >= minDate.month())
						&& (!inMaxYear || m <= maxDate.month())) {
					monthHtml += "<option value='"
							+ m
							+ "'"
							+ (m === currentMonth ? " selected='selected'" : "")
							+ ">" + this.locale.monthNames[m] + "</option>";
				}
			}
			monthHtml += "</select>";

			var currentYear = selected.year();
			var maxYear = (maxDate && maxDate.year()) || (currentYear + 5);
			var minYear = (minDate && minDate.year()) || (currentYear - 50);
			var yearHtml = '<select class="yearselect">';

			for ( var y = minYear; y <= maxYear; y++) {
				yearHtml += '<option value="' + y + '"'
						+ (y === currentYear ? ' selected="selected"' : '')
						+ '>' + y + '</option>';
			}

			yearHtml += '</select>';

			return monthHtml + yearHtml;
		},

		renderCalendar : function(calendar, selected, minDate, maxDate) {

			var html = '<div class="calendar-date">';
			html += '<table class="table-condensed">';
			html += '<thead>';
			html += '<tr>';

			// add empty cell for week number
			if (this.showWeekNumbers)
				html += '<th></th>';

			if (!minDate || minDate.isBefore(calendar[1][1])) {
				html += '<th class="prev available"><i class="fa fa-arrow-left icon-arrow-left glyphicon glyphicon-arrow-left"></i></th>';
			} else {
				html += '<th></th>';
			}

			var dateHtml = this.locale.monthNames[calendar[1][1].month()]
					+ calendar[1][1].format(" YYYY");

			if (this.showDropdowns) {
				dateHtml = this.renderDropdowns(calendar[1][1], minDate,
						maxDate);
			}

			html += '<th colspan="5" class="month">' + dateHtml + '</th>';
			if (!maxDate || maxDate.isAfter(calendar[1][1])) {
				html += '<th class="next available"><i class="fa fa-arrow-right icon-arrow-right glyphicon glyphicon-arrow-right"></i></th>';
			} else {
				html += '<th></th>';
			}

			html += '</tr>';
			html += '<tr>';

			// add week number label
			if (this.showWeekNumbers)
				html += '<th class="week">' + this.locale.weekLabel + '</th>';

			$.each(this.locale.daysOfWeek, function(index, dayOfWeek) {
				html += '<th>' + dayOfWeek + '</th>';
			});

			html += '</tr>';
			html += '</thead>';
			html += '<tbody>';

			for ( var row = 0; row < 6; row++) {
				html += '<tr>';

				// add week number
				if (this.showWeekNumbers)
					html += '<td class="week">' + calendar[row][0].week()
							+ '</td>';

				for ( var col = 0; col < 7; col++) {
					var cname = 'available ';
					cname += (calendar[row][col].month() == calendar[1][1]
							.month()) ? '' : 'off';

					if ((minDate && calendar[row][col].isBefore(minDate))
							|| (maxDate && calendar[row][col].isAfter(maxDate))) {
						cname = ' off disabled ';
					} else if (calendar[row][col].format('YYYY-MM-DD') == selected
							.format('YYYY-MM-DD')) {
						cname += ' active ';
						if (calendar[row][col].format('YYYY-MM-DD') == this.startDate
								.format('YYYY-MM-DD')) {
							cname += ' start-date ';
						}
						if (calendar[row][col].format('YYYY-MM-DD') == this.endDate
								.format('YYYY-MM-DD')) {
							cname += ' end-date ';
						}
					} else if (calendar[row][col] >= this.startDate
							&& calendar[row][col] <= this.endDate) {
						cname += ' in-range ';
						if (calendar[row][col].isSame(this.startDate)) {
							cname += ' start-date ';
						}
						if (calendar[row][col].isSame(this.endDate)) {
							cname += ' end-date ';
						}
					}

					var title = 'r' + row + 'c' + col;
					html += '<td class="'
							+ cname.replace(/\s+/g, ' ').replace(
									/^\s?(.*?)\s?$/, '$1') + '" data-title="'
							+ title + '">' + calendar[row][col].date()
							+ '</td>';
				}
				html += '</tr>';
			}

			html += '</tbody>';
			html += '</table>';
			html += '</div>';

			if (this.timePicker) {

				html += '<div class="calendar-time">';
				html += '<select class="hourselect">';
				var start = 0;
				var end = 23;
				var selected_hour = selected.hour();
				if (this.timePicker12Hour) {
					start = 1;
					end = 12;
					if (selected_hour >= 12)
						selected_hour -= 12;
					if (selected_hour == 0)
						selected_hour = 12;
				}

				for ( var i = start; i <= end; i++) {
					if (i == selected_hour) {
						html += '<option value="' + i
								+ '" selected="selected">' + i + '</option>';
					} else {
						html += '<option value="' + i + '">' + i + '</option>';
					}
				}

				html += '</select> : ';
				html += '<select class="minuteselect">';

				for ( var i = 0; i < 60; i += this.timePickerIncrement) {
					var num = i;
					if (num < 10)
						num = '0' + num;
					if (i == selected.minute()) {
						html += '<option value="' + i
								+ '" selected="selected">' + num + '</option>';
					} else {
						html += '<option value="' + i + '">' + num
								+ '</option>';
					}
				}

				html += '</select> ';
				html += '<button class="applyBtn_s btn btn-success btn-sm pull-right" disabled="disabled"></button>';
				if (this.timePicker12Hour) {
					html += '<select class="ampmselect">';
					if (selected.hour() >= 12) {
						html += '<option value="AM">AM</option><option value="PM" selected="selected">PM</option>';
					} else {
						html += '<option value="AM" selected="selected">AM</option><option value="PM">PM</option>';
					}
					html += '</select>';
				}

				html += '</div>';

			}

			return html;

		},

		remove : function() {

			this.container.remove();
			this.element.off('.daterangepicker');
			this.element.removeData('daterangepicker');

		}

	};

	$.fn.daterangepicker = function(options, cb) {
		this.each(function() {
			var el = $(this);
			if (el.data('daterangepicker'))
				el.data('daterangepicker').remove();
			el.data('daterangepicker', new DateRangePicker(el, options, cb));
		});
		return this;
	};

}(window.jQuery);
